Re: [PATCH v4 2/5] soc: qcom: rpmh-rsc: We aren't notified of our own failure w/ NOTIFY_BAD

[Stephen Boyd]

Quoting Douglas Anderson (2020-04-22 14:55:00)
> When a PM Notifier returns NOTIFY_BAD it doesn't get called with
> CPU_PM_ENTER_FAILED.  It only get called for CPU_PM_ENTER_FAILED if
> someone else (further down the notifier chain) returns NOTIFY_BAD.
> 
> Handle this case by taking our CPU out of the list of ones that have
> entered PM.  Without this it's possible we could detect that the last
> CPU went down (and we would flush) even if some CPU was alive.  That's
> not good since our flushing routines currently assume they're running
> on the last CPU for mutual exclusion.
> 
> Fixes: 985427f997b6 ("soc: qcom: rpmh: Invoke rpmh_flush() for dirty caches")
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> ---

Reported-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>